Asynchronous remote replication method, apparatus and system

Embodiments of the present invention disclose an asynchronous remote replication method, apparatus and system. The method is applied to a disk array of a local device. Except for being provided with amaster volume, the disk array is additionally provided with an incremental data area. The method com...

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Bibliographische Detailangaben
Hauptverfasser: NIU KEQIANG, DAI QINGJUN, SHU TAN, LIANG QINGYONG, ZHANG YI, QIN CHANGPENG, LIU MAOYIN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:Embodiments of the present invention disclose an asynchronous remote replication method, apparatus and system. The method is applied to a disk array of a local device. Except for being provided with amaster volume, the disk array is additionally provided with an incremental data area. The method comprises that: a master volume receives a write request sent by a host; the master volume determinesthat the current target data block is in an asynchronous remote replication process, and the disk array sets the master volume to be an internal read-only state, and writes the new data into the datablock of the incremental data area; the disk array establishes the address mapping of the new data between the data block in the incremental data area and the data block in the master volume; and during the asynchronous remote replication process, the disk array forms the data block in the master volume and the data block in the incremental data area into difference data according to the address mapping of the new data betw